Notch1在前列腺癌细胞PC3中对其配体Jagged1表达的调控

Regulation of Jagged1 expression by its receptor Notch1 in prostate cancer PC3 cells

目的探讨在前列腺癌细胞PC3中,Notch1和Jagged1对细胞生长的影响,及Notch1对其配体Jagged1表达的调控作用。方法通过siRNA干扰的方法分别抑制Notch1和Jagged1蛋白的表达,用MTT法检测PC3细胞的生长;分别通过siRNA干扰和转染质粒的方法,抑制和促进PC3细胞中Notch1蛋白的表达,用Western blot检测Jagged1蛋白水平,用Real-timePCR检测Jagged1 mRNA水平。结果抑制Notch1和Jagged1蛋白的表达后,PC3细胞的生长减慢;抑制Notch1的表达引起Jagged1的蛋白水平下降而过表达Notch1引起Jagged1的蛋白水平上升,同时,Jagged1蛋白水平与mRNA水平的变化不一致。结论Notch1和Jagged1对前列腺癌细胞PC3的生长有重要影响。Notch1可以调控其配体Jagged1的表达。

Objective To investigate the effect of Notch1 and Jagged1 on the growth of prostate cancer PC3 ceils and the regulation of Jagged1 expression by its receptor Notch1 in PC3. Methods Notch1 and Jaggedl expression were inhibited by siRNA interference. The growth rate of PC3 cells was measured by MTT. Notch1 expression was inhibited by siRNA interference and promoted by transfection of Notch1 cDNA. The changes of Notchl and Jagged1 protein and mRNA levels were measured by Western blot and Real-time RCR. Results The growth of PC3 cells decreased after inhibiting Notch1 and Jagged1 expression. Jagged1 protein level decreased after inhibiting Notch1 expression and increased after over-expressing Notchl. Moreover, the change of Jagged1 protein level was discord- ant with the situation of mRNA. Conclusion In PC3 ceils, Notch1 and Jagged1 are important to cell growth. Notch1 may regulate Jagged1 expression.